"Comparison of the ranging function of three types of underwater acoust" by Katherine Domrese, Andrew Szajna et al.
 

Comparison of the ranging function of three types of underwater acoustic modems

Document Type

Conference Proceeding

Publication Date

2-6-2015

Abstract

© 2014 IEEE. Finding the position of a device within an underwater network, known as localization, has been critical for the advancement of autonomous underwater vehicle (AUV) research. Many of the current methods of underwater localization rely on a modem's ability to accurately estimate the time of flight for a given message transmission. This ability is also utilized by a modem's built-in ranging function. To advance the research in underwater localization, a comparison study was done on the ranging function of three commercially available underwater acoustic modems, all of which utilize different modulation schemes. A pair of AquaSeNT (OFDM), Benthos (MFSK), and LinkQuest (DSSS) acoustic modems were tested at several positions in both a pool and lake environment. It was found that the AquaSeNT was the most robust, as in it always calculated a distance, at the expense of precision. The precision of the AquaSeNT was effected by a consistent 8-m bias. The LinkQuest was found to be the most accurate and precise, but had issues communicating in short channels (large delay spread), and would occasionally produce erroneous measurements. The Benthos had a balance between communication success as well as precision and accuracy.

Publication Title

Proceedings - 11th IEEE International Conference on Mobile Ad Hoc and Sensor Systems, MASS 2014

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